TSM Auctioning Function for Setting up Groups is Pretty much the same as APM , if you are currently using APM then when you log in with TSM installed you will get the Below message .
Step 1 General Settings :
I normally leave these as they are set to ignore Auctions with more then 1000 items listed and to ignore the lowest if the price difference is more then 1000% . So leave these at there normal Settings.
Per auction - Stack Size if your selling mats then Set the size of stack you want to be selling.
Step 3 General Price Settings - Undercut buy is set at 1c as standard and I see no reason to change it .
Bid Percent - This will allow you to change the Bid prices of your auction for when you list them
Step 4 Minimum Price threshold :This sets up the price that you will stop listing the items at .
Step 6 Advanced Price Setting : This is when you can choose to have your item posted at the Fallback , not at all at a custom value or at your threshold. I always set mine at the Fallback
To add items to a group just select the Add/Remove tab and then click on the item